Eye ring for gas masks



Fb. 18, 1930. H. ENGELHARD 1,747,764

EYERING FOR GAS MASKS Filed Aug. 13, 1926 EZf/I7I7III7IIIii' c" 5 al lin nlor a v ifi m y Patented Feb. 18, 1930 UNITED STATES'IPATVENT orriceHEEMANN ENGELHARD, OF BERLIN, GERMANY, ASSIGNOR TO DEUTSCHE GASGLIIH-LIGHT-AUER-GESELLSCHAFT MIT BESCHRANKTER i-IAFTUNG, OF BERLIN, GER-MANY, A CORPORATION OF GERMANY EYE FOR GAS MASKS Application filedAugust 13, 1926, Serial No. 129,071, and in Germany September 4, 1925.

With masks of all kinds serving for the protection against suffocationby gases, it is of utmost importance that the range of vision isobstructed as little as possible. This fact is not properly taken intoaccount with the known eye-glasses, since the mountings of theeye-glasses are of too large dimensions, so that they cannot beapproached to the eyes sufiiciently enough without injurious annoyanceto the wearer by pressure. With the known mountings for eye-glasses forthe purpose mentioned, which are attached to the mask by rolling theminto the latter, there is the drawback, that the bent portion for thefabric of the mask is arranged behind the bent portion for the glasswindow.

The present invention obviates this drawback in such a manner that thebent portion for the eye-windows is situate-d adjacent the bent portionfor the fabric of the mask. In this way it is possible to reduce theheight of the mountings for the eye-glasses approximately by one half,that is to say almost to the height of the fabric of the mask or thethickness of the eye-window, thus the wearers eyes or the portions ofhis face close by will suffer no discomfort by pressure.

In the accompanying drawing one mode of execution of the invention isillustrated in a sectional view.

As shown in the illustrated example, the material a which comprises thebody of the mask is provided with an opening through which the annularflange b of a major ring 6 is inserted so that the material a at theperiphery of said opening is folded into surface engagement with, saidflange b. The flange b is bent to form an annular subflange b wherebythe folded portion a ofthe mask material a is clamped against theinwardly extending flange 0 of an auxiliary ring 0, the flange c and theopposed surface of the ring 6 providing a relatively wide flat bearingfor the material a, which at these points is folded upon itself, wherebysaid .material and rings are securely connected to fix the mounting inplace, the clamping surfaces of said flange 0 and ring 7) lyingapproximately in the plane of the material a. The main ring I) isdoubled upon itself as shown in the drawing and at its inner peripheryis provided with a bead (Z against which lies a sealing ring e of rubberor other suitable material. The lens or eye glass f is arranged incontact with the sealing ring e as shown and is clamped in place bymeans of a clamping ring 9 which possesses an inherent relatively strongresiliency whereby said ring 9 is caused to bear against the eye glass fwith sufficient pressure to maintain it in position in the mounting. Theclamping ring 9 itself is clamped between the flange b of the main ring5 and an annular flange 0 formed by bending the auxiliary ring 0inwardly as shown in the drawing.

WVith the arrangement illustrated and described the mounting for theeyeglass and material, as well as the material and the eyeglass all liein approximately the same plane, and the transverse height of themounting is reduced to a minimum. The eyeglasses may thus be broughtinto close proximity to the eyes of the wearer without developing anyannoying pressures or other uncomfortable conditions to the wearer ofthe mask.

I claim:

In a gas mask, the combination of a body of flexible material providedwith eye-openings,

a metallic mounting in each of said openings comprising a ma or ringconsisting of an annular flange defining the periphery of aneye-opening, and sub-flanges projecting outwardly from said annularflange in spaced, substantially parallel relation, an auxiliary ringconsisting of a peripheral flange and an inwardly extending flangeprojecting from said peripheral flange between said subfianges in spacedparallel relation thereto,

said sub-flanges and inwardly extending flanges providing relativelywide, flat bearingvsurfaces, said body material at the eyeopeningsextending between said sub-flanges and inwardly extending flange andbeing folded about the peripheral edge of the latter so as to be clampedby said flanges against said bearing surfaces, a bead forming part ofsaid maj or ring within the eye-opening thereof, a packing ring lyingagainst said head, an eyeglass in said eye-opening in engagement withsaid packing ring and lying in substantially the same plane as said bodymaterial, and a clamping ring lying in surface engagement with the onesub-flange of said major ring and projecting inwardly beyond a the sameinto engagement-With said eye-glass for clamping the latter against saidpacking ring, said auxiliary ring extending inward- 1y over saidclamping ring and clamping it against said one sub-flange.

m In testimony whereof I affix my signature.

HERMANN. ENGELHARD.

Hts

